Firearm rail



FIG. 1 is an isometric view of a firearm rail, showing my new design;

FIG. 2 is a left side view thereof;

FIG. 3 is a right side view thereof;

FIG. 4 is a top view thereof;

FIG. 5 is a bottom view thereof;

FIG. 6 is a front view thereof; and,

FIG. 7 is a rear view thereof.

The broken lines in the Figures depict portions of the firearm rail that form no part of the claimed design. 

CLAIM The ornamental design for a firearm rail, as shown and described. 